Hey guys, So I'm new to the world of DSLR Photography, but I picked up a Canon T2i with the standard kit lens back in October 2010 for a really good price ($350 said and done!). I've taken some great pictures since then. I'm shooting mostly in manual mode, although on hikes and stuff, I switch it over to P or TV for the shear ease of those modes. Anyways, I'm heading to Hawaii in 2 weeks, and I thought about picking up another lens for the trip. I plan on doing a lot of nature hiking, finding waterfalls, awesome beaches, etc. Of course, I'll be surfing and stuff while I'm there, so maybe my GF can snag some photos of me too. What lens would you recommend to take on this trip (in addition to the kit lens)? Thanks!